[OPENJPA-1676] PCClassFileTransformer.transform causing NPE when class name is null

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0, 2.1.0
• Fix Version/s: 2.1.0
• Component/s: kernel
• Environment: jdk1.6.20
• Assignee: Richard G. Curtis
• Reporter: Christophe Roos
• Created: 31/May/10 15:44
• Updated: 20/Sep/10 15:39
• Resolved: 13/Jul/10 15:11

Description

openjpa WARN [AWT-EventQueue-0] openjpa.Enhance - An exception was thrown while attempting to perform class file transformation on "null":
java.lang.NullPointerException
at org.apache.openjpa.enhance.PCClassFileTransformer.needsEnhance(PCClassFileTransformer.java:175)
at org.apache.openjpa.enhance.PCClassFileTransformer.transform0(PCClassFileTransformer.java:132)
at org.apache.openjpa.enhance.PCClassFileTransformer.transform(PCClassFileTransformer.java:120)
at sun.instrument.TransformerManager.transform(TransformerManager.java:169)
at sun.instrument.InstrumentationImpl.transform(InstrumentationImpl.java:365)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.lang.ClassLoader.defineClass(ClassLoader.java:466)
at com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl$TransletClassLoader.defineClass(TemplatesImpl.java:126)
at com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl.defineTransletClasses(TemplatesImpl.java:312)
at com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl.getTransletInstance(TemplatesImpl.java:349)
at com.sun.org.apache.xalan.internal.xsltc.trax.TemplatesImpl.newTransformer(TemplatesImpl.java:382)
at net.sourceforge.jeuclid.DOMBuilder.createTransformer(DOMBuilder.java:95)
at net.sourceforge.jeuclid.DOMBuilder.<init>(DOMBuilder.java:75)
at net.sourceforge.jeuclid.DOMBuilder$SingletonHolder.<clinit>(DOMBuilder.java:53)
at net.sourceforge.jeuclid.DOMBuilder.getInstance(DOMBuilder.java:110)
at net.sourceforge.jeuclid.layout.JEuclidView.<init>(JEuclidView.java:75)

The code causing the error is in the JVM, because defineClass is called with a null class name:

static final class TransletClassLoader extends ClassLoader {
TransletClassLoader(ClassLoader parent)

{ super(parent); }

/**

• Access to final protected superclass member from outer class.
  */
  Class defineClass(final byte[] b) { ====> return defineClass(null, b, 0, b.length); <===== }

  }